http://archive.clarionledger.com/VideoNetwork/2890809114001/Katy-Perry-Appointed-UNICEF-Goodwill-Ambassadorhttp://cdn.newslook.com/32/326c29dce738240da3b3349558a5a883/mp4_low/326c29dce738240da3b3349558a5a883-mp4_low.mp4http://archive.clarionledger.com/VideoNetwork/2890809114001/Katy-Perry-Appointed-UNICEF-Goodwill-Ambassadorhttp://cdn.newslook.com/32/326c29dce738240da3b3349558a5a883/images/frame_0041.jpgKaty Perry Appointed UNICEF Goodwill AmbassadorSinger Katy Perry was appointed Tuesday UNICEF's newest Goodwill Ambassador, with a special focus on improving the lives of the world's most vulnerable children and adolescents.newslookKaty Perryentertainment00:46